Well, you got to look at it from the author's side.

First off, how do you respond to a bad review? There's not going to be much of a connection. What is the author to say? Thank you, I'm so glad you hated my story.

Unless the reviewer is unclear about something and asks the author a question in the review, there's just not much to say about it. And likewise, for the 'Please write more!' reviews. Again, not much to say to that.

Maybe that's one of the shortcomings of reviews. From the author's point of view, they are difficult to respond to. It's rare that I do. And then I don't even know if the reviewer is going back to look at their reviews.

Come to think of it, I've never had a reviewer respond to a review that I've responded to. Why's that?